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. 2020 Jul 21;11:1343. doi: 10.3389/fimmu.2020.01343

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Copyright © 2020 Imani, Sadeghi, Khazaie, Emami, Sadeghi Bahmani and Brand.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Forest plot of random-effects analysis of serum interleukin-6 levels in children. The diamond shape indicates the pooled mean difference (MD). Each black box represents a point estimate of each study and also gives a representation of the study size (the bigger the box, the more participants in the study). A horizontal line representing the 95% confidence intervals (CIs) of the study result, with each end of the line representing the boundaries of CI. SD, standard deviation; OSAS, obstructive sleep apnea syndrome.